12020440 has 16 divisors (see below), whose sum is σ = 27046080. Its totient is φ = 4808160.

The previous prime is 12020431. The next prime is 12020441. The reversal of 12020440 is 4402021.

It is a self number, because there is not a number n which added to its sum of digits gives 12020440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150216 + ... + 150295.

It is an arithmetic number, because the mean of its divisors is an integer number (1690380).

Almost surely, 2^12020440 is an apocalyptic number.

12020440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12020440 is an abundant number, since it is smaller than the sum of its proper divisors (15025640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12020440 is a wasteful number, since it uses less digits than its factorization.

12020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300522 (or 300518 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12020440 is about 3467.0506197631. The cubic root of 12020440 is about 229.0727634375.

Adding to 12020440 its reverse (4402021), we get a palindrome (16422461).

The spelling of 12020440 in words is "twelve million, twenty thousand, four hundred forty".